EP0810129B1 - Auslöseverfahren für passive Sicherheitseinrichtungen in Fahrzeugen - Google Patents
Auslöseverfahren für passive Sicherheitseinrichtungen in Fahrzeugen Download PDFInfo
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- EP0810129B1 EP0810129B1 EP97107349A EP97107349A EP0810129B1 EP 0810129 B1 EP0810129 B1 EP 0810129B1 EP 97107349 A EP97107349 A EP 97107349A EP 97107349 A EP97107349 A EP 97107349A EP 0810129 B1 EP0810129 B1 EP 0810129B1
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- 238000000034 method Methods 0.000 title claims description 32
- 230000001133 acceleration Effects 0.000 claims description 34
- 239000011159 matrix material Substances 0.000 claims description 17
- 230000004913 activation Effects 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 2
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 description 31
- 239000013598 vector Substances 0.000 description 24
- 230000006870 function Effects 0.000 description 19
- 238000011002 quantification Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 10
- 230000006399 behavior Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 230000002123 temporal effect Effects 0.000 description 3
- 101100003180 Colletotrichum lindemuthianum ATG1 gene Proteins 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/0891—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values with indication of predetermined acceleration values
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
- B60R2021/01322—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value comprising variable thresholds, e.g. depending from other collision parameters
Definitions
- the invention relates to a method for triggering a passive Safety device in a vehicle for vehicle occupants according to the Preamble of claim 1 and a device according to the Preamble of claim 10.
- Passive safety devices in vehicles such as airbags, Belt tensioners or roll bars serve to keep the vehicle occupants in the event to protect an impact (crash) of the vehicle from injuries.
- DE 44 20 114 A1 describes a triggering device for personal protection devices described in vehicles where the detection of Impact direction two aligned in different directions Acceleration sensors are provided so that depending on the Direction of impact not only the front airbags but also if necessary Side airbags can be triggered.
- Known triggering methods of such safety devices lead the Acceleration signals from either a single or from two acceleration sensors are generated, one to integrate then compare the integration value with a crash threshold, to then trigger the passive safety device if necessary.
- acceleration signals Before the acceleration signals are integrated, they are usually amplified, filtered and fed to an unbalanced limiter, such as this is known from DE 38 16 587 A1. From a signal generated in this way a reference value is subtracted by means of a differential circuit and only then fed to an integrator. The further processing of the integrated acceleration signals take place in analog technology.
- acceleration signals In addition to the analog processing of acceleration signals is also their digital processing is known for example from DE 37 17 427. There the acceleration signals of two sensors are compared to one Gain and filter a sample and hold circuit fed, whose output signals from a downstream A / D converter be digitized. These digitized sensor signals are generated by a Microprocessor processed.
- Such digital processing is also known from DE 30 01 780 C2, where the acceleration signals using an 8-bit analog / digital converter implemented and processed by an 8-bit processor.
- DE 41 17 811 C2 also describes an evaluation method known from sensor signals, initially as acceleration signals be digitized. These digitized acceleration signals are in consecutive periods over a certain time interval detected and stored in a shift register. Becomes an integrator then the difference between the current and the specific Acceleration value past time interval supplied by from here to form a differential speed, its value as a trigger criterion serves. To carry out the storage and the difference formation is however, 8 bit resolution is also required.
- the object of the present invention is therefore a method of the type mentioned at the beginning, that with a small bit width gets along with the processing of the acceleration signals and therefore too its implementation with little software and hardware effort is feasible.
- this method according to the invention leads to a temporal rapid activation, so that there is almost no delay compared to the required trigger time occurs after the start of the crash.
- the method according to the invention allows an economical circuit implementation.
- Quantification of digital processing of the sensor signals since for example when using two sensors with two thresholds a maximum of 4 bits can be processed next to each other for quantification have to. This small bit width is due to the strong Input quantification possible, so that the dynamic trigger threshold can also be generated digitally.
- realization of the Process steps after the quantification also by an existing one Processor or an additional microprocessor (4-bit) made become.
- the generation of the dynamic trigger threshold is at one preferred embodiment additively from a constant value and a count value increasing with the timing of the time grid.
- the triggering threshold can advantageously be set such that it is small at the beginning and then exponentially with the given one Time grid increases. This ensures that immediately at the beginning of a Crashes a high sensitivity for the activation of the trigger means Security devices is guaranteed.
- the timing of the Time grid for setting the exponential course of the Tripping threshold and the constant value of the tripping threshold in Dependency of the vehicle signature can be selected and determined.
- Addition can also be provided as an evaluation matrix by quantifying the generated with each clock Sensor signals a matrix value is assigned.
- a device for performing the method according to the invention is specified in claim 10 and contains two sensors, which are arranged in the vehicle such that their Sensitivity axes with an angle of + 45 ° or - 45 ° against the Longitudinal axis of the vehicle are directed in the direction of travel.
- each assigned two quantification comparators each one Detect negative or positive threshold.
- Detection of such acceleration signals one against the Testify the direction of the direction of impact, a comparator used, which generates an output signal when the quantified Sensor signals of a clock cycle have positive signs at the same time.
- the rising trigger threshold is with a functional unit realized, which is operated both as a shift register and as a counter.
- This functional unit is followed by an adder in which a Constant value and a time-dependent counter value as dynamic Trigger threshold is added.
- the associated shift or counting cycle creates a division stage.
- Figure 1 shows an airbag control unit for motor vehicles with the Function blocks evaluation unit 1, power unit 2 and one Diagnostic computer 3. That of two acceleration sensors S1 and S2 delivered acceleration signals are used to evaluate the Evaluation unit 1 supplied, which based on these sensor signals on the Vehicle condition closes. If these acceleration signals point to a to indicate an impending collision of the vehicle will be avoided Line 1a passed ignition commands to the power unit 2.
- This Power unit generates ignition signals for the when there are ignition commands Release means of airbags 2b, belt tensioners 2a and buckle switch 2c.
- the Diagnostic computer 3 monitors and checks the functionality of the entire system.
- the sensors S1 and S2 and according to FIG. 3 are at 90 ° to one another offset and in each case by 45 ° against the direction of travel P in the vehicle F arranged so that the sensor signals also information regarding Deliver direction of impact.
- FIG. 1 A hardware implementation of the evaluation unit 1 according to FIG. 1 is shown in Figure 2 and consists of a quantification unit 4 and an evaluation circuit 5.
- the acceleration signal from sensor S1 is fed to two comparators K11 and K12 and the sensor signals from sensor S2 are each fed to two further comparators K21 and K22.
- a positive and negative threshold s1n, s1p or s2n, s2p serve as thresholds for quantification: Sensor S1: s1p and s1n with s1p> s1n, Sensor S2: s2p and s2n with s2p> s2n.
- the output of the quantification unit 4 thus has 4 lines 4a to the input of a buffer 6 designed with D flip-flops be placed.
- this comparator 7 it is checked whether the in each time cycle existing quantified sensor values of sensors S1 and S2 positive are (i.e., a direction of impact against the direction of travel of the vehicle Show). If this is the case, a start pulse is sent via line 7a a counter 8 and a functional unit 10, which either can be operated as a shift register or as a counter. At the same time a NAND gate 9 receives this start pulse, which at a corresponding Input signal via a line 9a, a reset signal for the counter 8 generated.
- the counter reading Z of this counter 8 now serves as a crash signal and is over a line 8a fed to a further comparator 11, the one Comparison with the dynamic trigger threshold (R + K1). Becomes this trigger threshold (R + K1) is exceeded by the crash signal Z, takes place activation of the triggering means of the safety devices.
- This displaceable trigger threshold (R + K1) is in an adder stage 12 generated by a start value K1, which is via a line 15a of a RAM register 15 is entered, a count increasing with the timing R, which comes from the functional unit 10 via a line 10a, is added becomes.
- the Count value R generated by the functional unit 10 exponentially in the clock cycle grow. This is realized together with a divider stage 13, which via a line 15b has a divider factor n from the RAM register 15 and receives the clock signal clk at the same time. From this are a clock signal clk1 generated with a lower clock frequency compared to the clock signal clk. With the Divider factor n is the increase in the exponential trigger threshold vary and thus adapt to the vehicle signature.
- the method can also evaluate the sensor signals by means of a simple 4-bit processor. So there is Evaluation unit 1 according to FIG. 4 from a quantification unit 4 and a microprocessor ⁇ P. The other functional units correspond those from FIG. 1. After starting the program according to FIG in step 1 a counter function Z, a divider function n and a Register content R set to "0". The meaning of the functions Z and R was already shown in connection with the explanation of Figure 2. In step 2, the start value K1 is set, the meaning of which is also in In connection with Figure 2 was explained.
- step 3 If the safety devices are ready for operation (cf. step 3), it is then checked in a step 4 whether one of the sensor signals S1 or S2 is "0" and the most significant bit position bit H is occupied. If this is the case, the operating mode "shift register” is activated according to step 5. In the other case, this step 5 is skipped.
- step 6 If both quantified sensor signals S 1q and S 2q are positive according to step 6, the counter function Z is then increased by 1 ". If this is not the case, the counter is set to" 0 "and only step 9 is carried out n + 1 is carried out until an upper barrier is reached (step 12.) When the barrier is reached, the register R is shifted and the divider n is reset to zero (step 13).
- step 10 it is checked whether in the operating mode "down counter" Register content (R> 0) is available. If this is the case Register content R reduced by "1", otherwise this step 11 skipped.
- step 12 if the operating mode "shift register” according to step 12 is present and the counter n has reached a threshold B, the divider n is set to "0" and the register content R is increased by "1" and at the same time a "1" is added (cf. step 13).
- step 12 the operating mode "shift register” (see step 12) is not available or if n ⁇ B, then the sum of register contents R and Start value K1 formed, which now represents the trigger threshold, and with the Counter reading Z compared. If this trigger threshold is exceeded, it takes place a triggering of the safety devices (see step 17), otherwise there is a jump back after step 3.
- the mode of action of this is shown in the diagram according to FIG Evaluation method shown.
- the curves S1 and S2 give the Course of the acceleration signals of sensors S1 and S2 during a Collision. At the beginning of the collision, both show Sensor signals simultaneously positive values, so that the crash signal Z is linear increases and at the same time the trigger threshold (R + K1) is generated. in the The intersection of these two curves Z and (R + K1) triggers the Safety devices.
- the quantified sensor signals S 1q and S 2q can be subjected to an evaluation for generating sensor signal identification values which are used to derive a crash signal.
- FIG. 7 A hardware implementation of such an evaluation is shown in FIG. 7, only a section of the circuit arrangement according to FIG. 2 is shown.
- the quantified sensor signals S 1q and S 2q at the output of the buffer memory 6 are not only fed to the comparator 7 but also to an adder 17 via a line 6a.
- the quantified sensor signals are added up, so that their sum is available at each output as a 3-bit vector at its output, which is then fed to processing units connected downstream via line 17a.
- This addition represents an evaluation function, which is applied to the quantified sensor signals in order to generate a sensor signal identification value, ie the sum, with each time cycle.
- the truth table of such an evaluation function for the two sensors S1 and S2 is to be shown as an example below, the sensitivity axes of which are arranged according to FIG. 3.
- Sensor S1 can thus be referred to as the left sensor and sensor S2 as the right sensor when viewed in the direction of travel.
- vectors V output by the adder 17 are fed via line 17a to a comparator 20, a register 19 and a functional unit 18, which forms the difference and its amount from the vector V currently supplied and a vector V 0 generated in the previous time cycle.
- This vector V 0 is stored in the register 19 and is supplied to the functional unit 18 at intervals in time via a line 19a.
- the operation performed in the functional unit 18 corresponds to one Differentiation with subsequent calculation of the sum of the quantified sensor values, which is the amount of the slope of successive sum values on line 18a leading to one Integrator 23 leads, queue.
- this integrator 23 are in successive time cycles formed slope values added up and forms a crash signal P, which in a downstream comparator 25 with a trigger threshold K3 is compared. If this trigger threshold K3 from the crash signal P is reached, a downstream OR gate 26 is used Safety devices triggered. One entrance of the OR gate 26 the crash signal P and the other input that of the Comparator 11 generated according to Figure 2 generated crash signal.
- this integrator 23 should always be reset if there is no tripping over a certain period of time.
- the count value generated by the counter 21 is compared with a time constant T R provided by a register RAM 14 via a line 14b by means of the comparator 22. If the count value supplied to the comparator 12 via a line 21a exceeds this time constant T R, the integrator 23 is supplied with a reset pulse via a line 22a.
- the reset input of counter 21 is connected to the output of comparator 20 connected, its output signals also via a line 20a AND gate 24 supplies, which also receives the clock signal clk.
- the Clock signal clk is therefore only released for integrator 23 if an output signal of the comparator 20 is present.
- An output signal is generated by the comparator 20 when an vector generated by the adder 17 exceeds a count threshold K2.
- This count threshold K2 is transmitted via a line 14a from the register RAM 14 provided.
- Vector V Comparator 20 output (0, 0, 0) 0 (0, 0, 1) 1 (0, 1, 0) 1 (1, 0, 1) 0 (1, 1, 0) 0
- the comparator 20 only generates an output signal for the vectors (0, 0, 1) and (0, 1, 0), that is to say only if a collision from the left or right at the front or in the direction of travel from the front is expected.
- the counter 21 is set to "0" and likewise causes the integrator 23 to be reset if the crash signal P generated by the integrator 23 does not reach the trigger threshold K3 within the time constant T R.
- This trigger threshold K3 is also stored in the register RAM 14.
- the two constants K2 and T R must be coordinated with one another and are determined on the basis of crash data available for each vehicle type. These constants must be selected so that tripping must take place when this is required or no false tripping may occur.
- the method carried out with the circuit arrangement according to FIG. 7 fulfills these conditions with appropriately selected constants K2 and T R , ie classifies all crashes to 100%, ignition delay times that may occur are negligible due to the properties of the parallel circuit arrangement according to FIG. 2. Since the triggering time of the safety devices must take place within a certain time period after the detection of a dangerous crash by the sensors, the ignition delay time indicates the time period that extends beyond this specific time period.
- this can be additional Evaluation of the sensor signals using a simple 4-bit processor be performed.
- a software implementation provided for such a microprocessor ⁇ P is shown in the program flow chart according to FIG. 8.
- the program variables P, V 0 and T are initialized in step 1.
- P represents the value of the integrated values of the amounts of the slopes
- V 0 is the vector belonging to a vector V from a preceding time cycle
- T indicates the time cycle.
- step 2 If it is determined in step 2 that the airbag is ready for operation, the sum of the quantified sensor signals sens L (of the left sensor) and sens R (of the right sensor) is formed as vector V.
- This vector V is then compared in step 4 with the counting threshold K2, the meaning of which was explained in connection with FIG. 7. If the vector V exceeds this constant K2, the absolute value of the difference from this vector V is formed with the vector V 0 formed in the previous time pulse and integrated according to the formula given, that is to say added to the preceding integrator value P.
- the clock pulse T is also set to "0". in the other case this step 5 is skipped and the timing in step 6 is compared with the time constant T R , the meaning of which has also already been explained in connection with FIG. 7. If the time pulse T reaches this threshold, the integrator value P is then reset in step 7. Otherwise step 7 is skipped.
- the integrator value P is compared with a trigger threshold K3 in step 8 and the safety devices in the vehicle are triggered if necessary (cf. step 9). If the trigger threshold K3 has not yet been reached, the time pulse T is set to T + 1 and the current vector V becomes the vector V 0 (cf. step 10) in order to then start again with step 3.
- An evaluation of the directional information can be used instead of Evaluation function "addition" with an evaluation matrix according to FIG. 9 realize, where only a section of the circuit arrangement according to FIG. 7.
- adder 17 instead of that from FIG. 7 known adder 17 a parameter matrix as RAM matrix 171 switched between the buffer memory 6 and the functional unit 18, whose functions have been explained in connection with FIG. 7.
- a the associated evaluation matrix is shown in FIGS. 10a and 10b.
- the quantified sensor values 0, 1 and -1 represent the Information "no acceleration", “positive acceleration” or “Negative acceleration” represents.
- the gi values are at the output of the RAM matrix 171 the gi values as 3-bit vectors V, which are similar to that Vectors V are processed according to FIG. 7. It has been shown that an accuracy of 3 bits of a gi value is sufficient so that each individual value can be between -3 and 3.
- the optimal allocation of the RAM matrix 171 depends on the respective vehicle signature and must open the respective vehicle can be tuned using crash data. In addition to the 100% classification, such an evaluation also Directional information also the temporal behavior in relation to the Activation in the event of a crash improved.
- a further improvement of the time behavior is with the Assessment matrix achieved according to Figure 10b, where the quantification of the Sensor signals not with a positive and negative threshold Sn and Sp takes place, but where both switching thresholds are positive and with a high and low threshold is quantified, i.e. a strong or weak one Acceleration is detectable.
- a software implementation is also possible with such an evaluation matrix possible as an evaluation function and corresponds essentially the program flow chart of Figure 8 with the difference that the Vector not formed as an addition from the quantified sensor values is, but can be seen from the evaluation matrix.
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Description
Sensor S1: s1p und s1n mit s1p > s1n,
Sensor S2: s2p und s2n mit s2p > s2n.
Das Abwärtszählen erfolgt dagegen bitweise und somit wesentlich langsamer. Dies hat zur Folge, daß eine bestimmte Zeitdauer vergehen muß, bis das Verfahren (also die Umschaltung auf die Funktion "Schieberegister") erneut aktiviert werden kann.
| linker Sensor S1 | rechter Sensor S2 | Ausgang Addierstufe 17 | ||||
| s1p | s1n | s2p | s2n | Vektor V | dez | |
| 1 | 0 | 0 | 0 | 0 | (0, 0, 0) | 0 |
| 2 | 1 | 0 | 0 | 0 | (0, 0, 1) | + 1 |
| 3 | 0 | 1 | 0 | 0 | (1, 0, 1) | -1 |
| 4 | 0 | 0 | 1 | 0 | (0, 0, 1) | +1 |
| 5 | 1 | 0 | 1 | 0 | (0, 1, 0) | +2 |
| 6 | 0 | 1 | 1 | 0 | (0, 0, 0) | 0 |
| 7 | 0 | 0 | 0 | 1 | (1, 0, 1) | -1 |
| 8 | 1 | 0 | 0 | 1 | (0, 0, 0) | 0 |
| 9 | 0 | 1 | 0 | 1 | (1, 1, 0) | -2 |
| Vektor V | Ausgang Komparator 20 |
| (0, 0, 0) | 0 |
| (0, 0, 1) | 1 |
| (0, 1, 0) | 1 |
| (1, 0, 1) | 0 |
| (1, 1, 0) | 0 |
Claims (12)
- Verfahren zur Auslösung einer passiven Sicherheitsvorrichtung in einem Fahrzeug für Fahrzeuginsassen, bei dem mittels elektrischer Sensoren (S1, S2), die einen kritischen Fahrzeugzustand detektieren, einer Auswerteschaltung und einem Auslösemittel in Abhängigkeit der von den Sensoren (S1, S2) erzeugten Beschleunigungssignale eine Aktivierung der Auslösemittel erfolgt, gekennzeichnet durch folgende Verfahrensschritte:a) Quantifizierung der Sensorsignale im Zeittakt eines vorgegebenen ersten Zeitrasters,b) Detektion derjenigen Beschleunigungssignale, deren zugehörige quantifizierten Sensorsignale (S1Q, S2Q) gleichzeitig eine Aufprallrichtung entgegen der Fahrtrichtung des Fahrzeuges anzeigen,c) Erzeugung eines linear ansteigenden Crash-Signales (Z), falls in aufeinanderfolgenden Zeittakten die Beschleunigungssignale eine Aufprallrichtung entgegen der Fahrtrichtung des Fahrzeuges anzeigen,d) Erzeugung einer mit dem Zeittakt eines zweiten Zeitrasters ansteigenden Auslöseschwelle (K1 + R) zum Zeitpunkt des Beginns des linear ansteigenden Crash-Signals (Z), unde) Aktivierung der Auslösemittel, falls der Wert des Crash-Signals (Z) die Auslöseschwelle (K1 + R) erreicht.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Auslöse-schwelle (K1 + R) exponentionell ansteigt.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Auslöse-schwelle (K1 + R) sich additiv aus einem Konstantwert (K1) und einem mit dem Zeittakt des zweiten Zeitrasters ansteigenden Zählwert (R) bildet.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Zeittakt (clk1) des zweiten Zeitrasters und der Konstantwert (K1) der Auslöse-schwelle (K1 + R) in Abhängigkeit der Fahrzeugsignatur bestimmt wird.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die quantifizierten Sensorsignale (S1q, S2q) zwischengespeichert werden.
- Verfahren nach einem der vorangehenden Ansprüche, gekennzeichnet durch folgende Verfahrensschritte:a) Erzeugung von Sensorsignalkennungswerten aus den quantifizierten Sensorsignalen (S1q, S2q) mittels einer Bewertungsfunktion,b) Differenzierung der Sensorsignalkennungswerte,c) Betragsbildung der differenzierten Sensorsignalkennungswerte,d) Integration der Beträge der differenzierten Sensorsignalkennungswerte, unde) Aktivierung der Auslösemittel, wenn der Integrationswert (P) eine Auslöseschwelle (K3) erreicht.
- Verfahren nach Anspruche 6, dadurch gekennzeichnet, daß als Bewertungsfunktion eine Addition der quantifizierten Sensorsignale (S1q, S2q) durchgeführt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß als Bewertungsfunktion eine Bewertungs-Matrix vorgesehen ist und daß den mit jedem Zeittakt erzeugten quantifizierten Sensorsignalen (S1q, S2q) ein Matrixwert zugeordnet wird.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zur Quantifizierung der Sensorsignale eine positive und eine negative Schwelle (S1p, S1n, S1n, S2p, S2n) eingesetzt wird.
- Vorrichtung zur Auslösung einer passiven Sicherheitsvorrichtung in einem Fahrzeug für Fahrzeuginsassen, bei dem mittels elektrischer Sensoren (S1, S2), die einen kritischen Fahrzeugzustand detektieren, einer Auswerteschaltung und einem Auslösemittel in Abhängigkeit der von den Sensoren (S1, S2) erzeugten Beschleunigungssignale eine Aktivierung der Auslösemittel erfolgt,a) wobei zwei der Sensoren (S1, S2) vorgesehen und im Fahrzeug derart angeordnet sind, daß deren Empfindlichkeitsachsen mit einem Winkel von +45° bzw. -45° gegen die Längsachse des Fahrzeuges in Fahrtrichtung gerichtet sind,
dadurch gekennzeichnet, daß
Mittel zur Durchführung der Verfahrenschritte nach einem der vorangehenden Ansprüche 1 bis 9 vorgesehen sind, wobeib) zur Quantifizierung der Sensorsignale den Sensoren (S1, S2) jeweils zwei Quantifizierungskomparatoren (K11, K12, K21, K22) mit einem positiven und einem negativen Schwellwert (s1p, s1n, s2p, s2n) vorgesehen sind, undc) zur Detektion der die entgegen der Fahrtrichtung gerichteten Aufprallrichtung anzeigenden Beschleunigungssignale ein Komparator (7) eingesetzt wird, der ein Ausgangssignal erzeugt, wenn die quantifizierten Sensorsignale (S1q, S2q) eines Zeittaktes gleichzeitig positive Vorzeichen aufweisen. - Vorrichtung nach Anspruch 10, bei der zur Erzeugung des Crash-Signals (Z) dem Komparator (7) eine zählerstufe (8) nachgeschaltet ist.
- Vorrichtung nach einem der Ansprüche 10 oder 11, die zur Erzeugung der ansteigenden Auslöseschwelle (K1 + R) eine als Schieberegister oder Zählerstufe arbeitende Funktionseinheit (10) aufweist, deren Schiebetakt (clk1) als zweites Zeitraster von einer Teilerstufe (13) erzeugt wird, und wobei dieser Funktionseinheit (10) ein Addierer (12) zur Erzeugung der Auslöseschwelle (K1 + R) nachgeschaltet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19619412A DE19619412C1 (de) | 1996-05-14 | 1996-05-14 | Auslöseverfahren für passive Sicherheitseinrichtungen in Fahrzeugen |
| DE19619412 | 1996-05-14 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0810129A2 EP0810129A2 (de) | 1997-12-03 |
| EP0810129A3 EP0810129A3 (de) | 1998-01-14 |
| EP0810129B1 true EP0810129B1 (de) | 2000-09-13 |
Family
ID=7794286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97107349A Expired - Lifetime EP0810129B1 (de) | 1996-05-14 | 1997-05-03 | Auslöseverfahren für passive Sicherheitseinrichtungen in Fahrzeugen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6115659A (de) |
| EP (1) | EP0810129B1 (de) |
| DE (2) | DE19619412C1 (de) |
| ES (1) | ES2151204T3 (de) |
Cited By (1)
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| DE102007029764A1 (de) * | 2006-06-27 | 2008-01-03 | Conti Temic Microelectronic Gmbh | Vorrichtung und Verfahren zur Sensierung einer gerichteten physikalischen Größe |
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| DE19736328A1 (de) * | 1997-08-21 | 1999-02-25 | Bayerische Motoren Werke Ag | Einrichtung und Verfahren zur Steuerung von Unfallschutz-Auslöseeinrichtungen in Kraftfahrzeugen |
| DE19751839A1 (de) * | 1997-11-22 | 1999-05-27 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Erkennung einer Kipptendenz eines Fahrzeuges |
| DE19812830B4 (de) * | 1998-03-24 | 2006-07-20 | Volkswagen Ag | Verfahren und Vorrichtung zur Auslösung eines Airbags mit Sitzpositionserkennung |
| JP2000272467A (ja) * | 1998-05-22 | 2000-10-03 | Denso Corp | 車両用乗員保護システムのための衝突判定装置 |
| JP2000255373A (ja) * | 1999-03-02 | 2000-09-19 | Mitsubishi Electric Corp | 車両衝突検出装置 |
| US6840538B2 (en) * | 1999-09-27 | 2005-01-11 | Autoliv Asp, Inc. | Method and system of actuating a deployment of a vehicle restraint system |
| DE10025260B4 (de) * | 2000-05-22 | 2004-11-25 | Conti Temic Microelectronic Gmbh | Verfahren zur Detektion von Überrollvorgängen bei Kraftfahrzeugen mit Sicherheitseinrichtungen |
| US6970778B1 (en) * | 2000-07-07 | 2005-11-29 | Siemens Aktiengesellschaft | Passenger restraint system for a motor vehicle |
| DE102004029816A1 (de) * | 2004-06-19 | 2006-01-05 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Erkennung eines Unfalls im Kraftfahrzeugbereich |
| DE102005038593A1 (de) * | 2005-08-16 | 2007-02-22 | Robert Bosch Gmbh | Kontaktsensorik für ein Fahrzeug |
| CN101535092B (zh) * | 2006-11-14 | 2012-05-23 | 三菱电机株式会社 | 乘客保护装置的启动装置 |
| DE102007030313A1 (de) * | 2007-06-29 | 2009-01-02 | Robert Bosch Gmbh | Verfahren und Steuergerät zur Ansteuerung von Personenschutzmitteln |
| US20130317777A1 (en) * | 2012-05-24 | 2013-11-28 | Hamilton Sundstrand Corporation | High impact energy sensor |
| US9537956B1 (en) * | 2015-12-11 | 2017-01-03 | Uber Technologies, Inc. | System for acquiring time-synchronized sensor data |
| US10101747B2 (en) | 2015-12-11 | 2018-10-16 | Uber Technologies, Inc. | Formatting sensor data for use in autonomous vehicle communications platform |
| US9596666B1 (en) | 2015-12-11 | 2017-03-14 | Uber Technologies, Inc. | System for processing asynchronous sensor data |
| US9785150B2 (en) | 2015-12-11 | 2017-10-10 | Uber Technologies, Inc. | Formatting sensor data for use in autonomous vehicle communications platform |
| US10114103B2 (en) | 2016-03-31 | 2018-10-30 | Uber Technologies, Inc. | System and method for sensor triggering for synchronized operation |
| US10482559B2 (en) | 2016-11-11 | 2019-11-19 | Uatc, Llc | Personalizing ride experience based on contextual ride usage data |
| US11613220B2 (en) * | 2018-12-17 | 2023-03-28 | Lear Corporation | Electrical assembly |
| US12334763B1 (en) | 2020-09-22 | 2025-06-17 | Everedge Solutions LLC | Electricity interrupter vehicle safety device, system and method |
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| US3762495A (en) * | 1970-07-04 | 1973-10-02 | Nissan Motor | Method and device for triggering motor vehicle safety mechanisms |
| DE3001780C2 (de) * | 1980-01-18 | 1984-09-27 | Becker Autoradiowerk Gmbh, 7516 Karlsbad | Steueranordnung für Sicherheitseinrichtungen in Fahrzeugen |
| DE3717427C3 (de) * | 1987-05-23 | 1994-09-01 | Deutsche Aerospace | Aufprallsensor für Kraftfahrzeuge |
| DE3733837A1 (de) * | 1987-10-07 | 1989-04-27 | Messerschmitt Boelkow Blohm | Schaltungsanordnung zum erfassen von beschleunigungen |
| DE3816588A1 (de) * | 1988-05-16 | 1989-11-23 | Messerschmitt Boelkow Blohm | Einrichtung zur ausloesung einer passiven sicherheitseinrichtung |
| DE3816587A1 (de) * | 1988-05-16 | 1989-11-23 | Messerschmitt Boelkow Blohm | Einrichtung zur ausloesung einer passiven sicherheitseinrichtung |
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-
1996
- 1996-05-14 DE DE19619412A patent/DE19619412C1/de not_active Expired - Fee Related
-
1997
- 1997-05-03 DE DE59702336T patent/DE59702336D1/de not_active Expired - Lifetime
- 1997-05-03 EP EP97107349A patent/EP0810129B1/de not_active Expired - Lifetime
- 1997-05-03 ES ES97107349T patent/ES2151204T3/es not_active Expired - Lifetime
- 1997-05-13 US US08/855,645 patent/US6115659A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007029764A1 (de) * | 2006-06-27 | 2008-01-03 | Conti Temic Microelectronic Gmbh | Vorrichtung und Verfahren zur Sensierung einer gerichteten physikalischen Größe |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19619412C1 (de) | 1997-08-28 |
| US6115659A (en) | 2000-09-05 |
| DE59702336D1 (de) | 2000-10-19 |
| ES2151204T3 (es) | 2000-12-16 |
| EP0810129A3 (de) | 1998-01-14 |
| EP0810129A2 (de) | 1997-12-03 |
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